Vehicle headlight



Feb. 28, 1928. 1,661,077

A. J. B. MARSAT v VEHICLE HEADLIGHT Filed June 21. 1924 AlBHdYSdt INVENTOR,

A TTORNEZ S.

Patented F eb. 28, 1928.

I UNITED STATES 1 1,661,077 PATENT OFFICE.

ANTOINE JEAN-BAPTIST]! uansunor LE scissor; salmon.

'vnnicm mnmen'r.

Application filed June 21, 1924, Serial Io. 781,575, and in France July 13', 1m.

Head-lights for motor vehicles of the nonblinding type are known wherein a main horizontal beam of substantiall' flat form is produced which generally inc udean up- 5 per reflector in front of the illuminant and a lower reflector projecting the beam'of light on the road. H

The present invention has forits' object to collect that part of the total light -which J generally isnot utilized in such=head-lights and making use of the same chiefly for lighting the portion of the road and the sides thereof between the immediate foreground and the more distant regions whichv are illuminated by the main beam.

This result is obtained b the addition to the non-blinding head' .lig t of, an optical system comprising chiefly a concave mirror disposed above and to the'r'ear of the illu- WP minant' which latter-is in the form of an elongated filament.

This optical system comprises further two throu h the head light,

Re erring to the drawing in detail, the.

'40 head light comprises a horizontally elongated illuminant 'such as an electric lamp 1 ilament 1 wound in a spiral of small diameter relative to its length and disposed between the mirror 2 situated at its lower rear part and a smaller mirror 3- at itsupper front part. The mirror 2 has the shape of a paraboliccylinder, the focal line of which being situated on the filament. This mirror produces a' substantially horizontal beam so slightly divergent in the horizontaldirection. The mirror, 3 is a surface of revolution around an axis coinciding with the illuminant 1, its generatin line being a parabola 3, the focus of w ich is also on v '66 the illuminant.

The head light is completed at the upper rear part 'of the illuminant by a concave mirror 4 mounted between the mirrors 2 and 3 and serving to project light upon the road between the immediate-foreground which is directly {illuminated by the illuminant and the more distant regions which receive the li ht of "the main beam from the mirror 2. T e dotted line 0-6 in Fig. 2 indicates the line of 'juncture of the upper rear mirror 4 and the lower mirror 2. At the sides and extending'below the illuminant. are disposed the two mirrors 5 and 6 which reflect the light in beams upon the foreground of the. road, deflecting it to the right and left thus further illuminatin the fore oun A small horizontal mirror 7 having a diffusing surface is arranged below and forwardly of the illuminant 1 and reflects a small amount of nonblinding light above the horizontal.

' The light received by s the. up or front mirror 3 is reflected back upon t e mirror 2 and from the latter forwardly projecting a beam somewhat divergent at least in the horizontal direction. The light received by the upper rear concave mirrorA, is reflected directly through the open front ofthe head light, and is 5 read out upon the road in front of the ve icle. I What I claim is: A headlight of the non-blinding including an elongated horizontal illum1- nant perpendicular to the axis of the .headlight, a mirror disposed at the rear and be-' low said illuminant, and having the shape of a par' boliccylinder with its focal line on said illuminant, a second mirror disposed at the front of and above "said illuminant and having the shape of a surface of revolution about an axis substantially coinciding with the illuminant and having a parabolic enerating arc with the focus thereof. at' the illuminant, a third concave mirror of similar curvature to the second mentioned mirluminant, two mirrors disposed laterally of and below said illuminant, and a flat reflector with a difiusing surface located atmow: JEAN-BAPTIST! nun-J ype 1.60 ror disposed atthe rear and above said il- 

